code: def add_subparser(self, name, parser):
      # pylint: disable=protected-access
      description = """Create a vocabulary, compute dataset statistics and other training utilities."""
      subparser = parser.add_parser(
          name,
          description=description,
          help="Create a vocabulary, compute dataset statistics "
          "and other training utilities.",
      )
      subparser.add_argument(
          "param_path",
          type=unicode,
          help="path to parameter file describing the model and its inputs",
      )
      subparser.add_argument(
          "-s",
          "--serialization-dir",
          required=True,
          type=unicode,
          help="directory in which to save the output of the dry run.",
      )
  
      subparser.add_argument(
          "-o",
          "--overrides",
          type=unicode,
          default="",
          help="a JSON structure used to override the experiment configuration",
      )
  
      subparser.set_defaults(func=dry_run_from_args)
  
      return subparser
  
file_path: magnitude/pymagnitude/third_party/allennlp/commands/dry_run.py
imports: from __future__ import absolute_import
  import argparse
  import logging
  import os
  import re
  from allennlp.commands.train import datasets_from_params
  from allennlp.commands.subcommand import Subcommand
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.params import Params
  from allennlp.common.util import prepare_environment, get_frozen_and_tunable_parameter_names
  from allennlp.data import Vocabulary
  from allennlp.data.dataset import Batch
  from allennlp.models import Model
label_desc: Use image node_id 1 for calling the DryRun obj's underlying member method code with example usage: obj.add_subparser(name, parser) and returns: subparser